A method to evaluate the physical realizability of an arbitrary three-dimensional vectorial field distribution in the focal area is proposed. A parameter that measures the similarity between the designed (target) field and the physically achievable beam is provided. This analysis is carried out within the framework of the closest electromagnetic field to a given vectorial function, and the procedure is applied to two illustrative cases.
© 2013 Optical Society of America
Original Manuscript: April 9, 2013
Revised Manuscript: May 9, 2013
Manuscript Accepted: May 9, 2013
Published: June 7, 2013
Rosario Martínez-Herrero, Ignasi Juvells, and Artur Carnicer, "On the physical realizability of highly focused electromagnetic field distributions," Opt. Lett. 38, 2065-2067 (2013)